WinDrawChem from the previous post works off Chemical Markup Language (CML).
There's another language called CellML being developed by Auckland Bioengineering Institute. My eyes lit up as I checked the website! It does mathematical modelling.
Biological processes are modelled by Systems Biology Markup Language (SBML).
I don't know if this is useful to you at all, but its kind of fun. Have you heard of http://www.wolframalpha.com? You can use it to draw mathematical graphs among many other things.
ReplyDeletee.g. http://www.wolframalpha.com/input/?i=plot+sin+x+cos+y
or
http://www.wolframalpha.com/input/?i=myoglobin
or
http://www.wolframalpha.com/input/?i=octane
or
http://www.wolframalpha.com/examples/
You can even ask it about the weather:
http://www.wolframalpha.com/input/?i=weather